wp send mail function

inside-functions.php

<?php
/**
 * @Uses wp_mail() to send out email address
 * from a single field form.
 * Here is the form: 
 ************************************************************************************
    <form id="newsletterForm" action="<?php the_permalink(); ?>" method="POST">
			<div class="input-group">
				<input class="form-control"
					     placeholder="Email Address"
					     name="email" id="newsEmail" type="email"
               value="<?php if(isset($_POST['email'])) echo $_POST['email'];?>">

					<span class="input-group-btn">
						<button class="btn btn-default"
								    type="submit"><?php _e( 'Send', 'valuadd' ); ?></button>
					</span>
            <input type="hidden" name="submitted" id="submitted" value="true" />
			</div>
		</form>
***************************************************************************************    
* @usage: send_valuadd_news_form(); put just above form ON SAME PAGE as form
*
*/
function send_valuadd_news_form(){
  if (!isset($_POST['submitted'])) { return; }

    // get the info from the from the form
    $form = array();
    $form['email'] = $_POST['email'];

    // Build the message
    $message = "Email : " . $form['email'] ."\n";

    //set the form headers
    $headers = get_option('blogname');

    // The email subject
    $subject = __( 'Newsletter Sign Up', 'valuadd' );

    // Who are we going to send this form too
    $send_to = get_option('admin_email');

        $sentSuccess = wp_mail( $send_to, $subject, $message, $headers );
        if ( $sentSuccess )
        {

        $messageGood = __( 'We are so glad you can become part of our Website. We will be sending you our response as soon a we can.', 'valuadd' );
        echo '<div class="alert alert-success" id="newsletterSuccess">';
        echo $messageGood;
        echo '</div>';
        } else {
            echo $messageBad = __( 'Would you please use our contact form. There seems to be trouble with sending this form.', 'valuadd' );
            echo '<div class="alert alert-danger" id="newsletterSuccess">';
            echo $messageBad;
            echo '</div>';
            }
}

add_action('after_body', 'send_valuadd_news_form');
?>